>>3895525 (lb)
Like the US, there are many agencies in China. The main one is the 安全部 (An Quan Bu) also called the 国安部 (Guo An Bu, the National Security Agency -NSA), kind of a domestic/foreign agency. US acronym is the MSS (Ministry of State Security). All in all (many thanks to Google and Facebook) they're pretty competent.
Detained.
It's complicated. Lots of Byzantine shit going on there.
Look at Hamid Karzai's (President of Afghanistan) connection to UNOCAL. Building a natural gas pipeline from Tajikistan (Soviet Natural Gas untapped Ace in the Hole Nat Gas) thru Afghanistan to Pakistan.
https://en.wikipedia.org/wiki/Hamid_Karzai
Have a look at the health effects. Literally 100s of solid well-documented medical studies.
https://www.powerwatch.org.uk/library/index.asp
A pair of tits for you.